If you've had a gross and sticky car and driveway over the past couple weeks like me, and you aren't sure what it is, this article has some answers
https://www.kut.org/energy-environment/2022-09-20/sticky-substance-cars-aphids-insect-poop
https://www.kut.org/energy-environment/2022-09-20/sticky-substance-cars-aphids-insect-poop